Cover for digesters and other apparatus



1. PE RONY. COVER FOR DIGESTERS AND OTHERAPPARMUS.

APPLICATION FILED FEB. 24, 1920.

1,371,393. Patented Mar. 15,1921.

UNITED STATES PATENT OFFICE} JEAN PERONY. O7? ST.-OUEN, FRANCE, ASSIGNOR TO SOCIETE DOUTILLAGE MECANIQUE ET DUSINAGE DARTILLERIE, OF ST.-OUEN, FRANCE, A JOINT- STOCK COMPANY OF FRANCE.

COVER FOR DIGESTERS AND OTHER APPARATUS.

Specification of'Lctters Patent.

Patented Mar. 15, 1921.

Application filed February 24, 1920. Serial No. 360,794.

pressure.

In certain cases, the action of the internal pressure upon the oint packing of the cover renders the removal of this cover very difficult owing to the jamming of the joint packing.

The present invention has for its object an improved construction of cover in which this drawback is avoided, the removal of the cover as well as its replacement into position being capable of being effected with the greatest facility.

According to this invention, the cover comprises a packing ring of suitable plastic material mounted inside the cover and capable of being moved relatively to the latter by means of mechanism operable from the outside. By this means, without touching the cover which is in position on the vessel, it is possible to move at will the joint packing away from the body of the vessel,

. that is to say, to loosen it by operating the said mechanism in the requisite direction or to tighten the packing by an operation in the reverse direction.

In practice, the movable packing ring can be carried by a metal ring whose movements for the purpose of bringing the joint packing proper nearer to or away from the body of the vessel, are produced by means of a mechanism which comprises of course a member extending through the cover with a tight joint.

A practical constructional form of this invention is illustrated by way of example in the accompanying drawings showing the invention applied for jointing the cover of a bell-shaped vulcanizing press.

Figure 1 is a vertical longitudinal section along the axis of the apparatus showing the cover in position and the joint packing tightened.

Fig. 2 is a similar section showingthe cover in loosened.

In these figures, A is the vessel adapted to rece1ve a cover B by means of a bayonet olnt or any other known means of connectron. The cover has a cylindrical wall, the edge of which is adapted to engage the seat formed on the mouth of the vessel.

According to this invention, the cover is provided with a packing of plastic material C which when mounted inside the said cover,

position with the joint packing can be moved relatively to the latter by means of a mechanism operable from the outside. For this purpose the packing C may be carried by a metal ring D,whose external diameter is equal to the internal diameter of the cover, and being thus guided. the mechanism which is operable from the outside allows of raising or lowering at will the said ring D, and thereby bringing the 11p 0 of the packing G into or out of contact with the mouth of the vessel A.

In the example shown, the operating mechanism consists of rocking levers E-E fulcrumed on pivot pins f mounted in blocks F fixed to or formed on the inner wall of the cover B. The arm E of each lever engages by means of a spherical knob 0 formed on its free end, in a buttonhole slot (Z provided. in the metal ring D. The other arm E engages by means of a slot 6 formed in its free end with a pin 9 mounted in a block G projecting from a nut H.

In this nut there is adapted to rotate the screw-threaded portion i' of a spindle I which is journaled with a tight joint and by means of a collar i in the cover B. A handwheel J fixed on the spindle I, enables the spindle I to be rotated in the requisite direction, and thus cause at will the nut H to move up or down along the screw-threaded portion i of this spindle. This up or down movement produces as will be seen, a corresponding downward or upward movement respectively of the ring D of the packing C carried by the latter.

When it is desired to place the cover into or out of position, the packing C is brought into the position shown in Fig. 2, in which position there is no longer any contact between the said packing and its seat. From this moment onward it is easy to impart to the cover any desired movement for placpressure will press the packing firmly upon its seat It is to be understood that the operating mechanism, as also the mode of construction of the support for the joint packing proper, ;can vary widely in practice.

Having now particularly described and ascertained the nature of my said invention I and in what manner the same isto he performed, I declare that what I claim. v

1.Atight-j.ointed cover for digesters and other apparatus, comprising a receptacle provided 'witli'a seat, a cover adapted to engage said seat to closethe receptacle, means for holding the cover in place on the seat, an element slidahly mounted in the cover to move toiand from the seat, a packing carried by the Slidahle'element to hemo zed to and from the seat, levers pivoted within the cover and engaging the slidable element, and an element connectedwvith the levers and extending through the cover to he operatedoutside of the closedvreceptacle tomove the leversto actuate the slidable element carrying the packing. r

2. A cover as clalmed in claim 1, wherein the movable packing is carried by a metal ring fitting inside the cover and adapted to receive arising or falling movement by means of rocking levers :Eulcrnmed on, the

cover and pivoted at one end to the said ring and at their other end to a nut operated by the screw-threaded portion of a spindle j ournaled in the hack oi the cover.

3. A tight-jointed cover for digesters and other apparatus, comprising a receptacle provided with a seat, a cover having a cylindrical wallcto engage at its edge the seat to close the receptacle, means for holding the cover in place on the seat, a ring having a sliding engagement with the inner'face of the cylindrical wall of the cover, a packing carried by the ring to be moved to and from the seat, levers pivoted within the cover and engaging at one end the ring so that the movement of the levers will move the ring and packing toand from the seat, and an actuating member connected with the other end of the levers and extending through the cover to be operated outside of the closed receptacle to move the levers.

. at. A tight-jointed cover for digesters and other apparatus, comprising a receptacle proviucd with a seat, a cover adapted to engage said seat to close'the receptacle, means for holding the cover in place on the seat, a ring slidahle in the cover to and from the seat. a packing carried. by the ring levers pivoted to theinner side of the cover with the outer end of each. lever engaging the ring, nut engaging the inner ends of the levers, a rod ourna-ledfln the cover and extending through the same, said rod having at itsinner end a threaded engage ment with the nut, and turning means on the outer end oi the rod for rotating said rod to raise and lower the nut to actuate the l vers to slide the ring to move the packing into and out of engagement with the seat. 1

Dated this 16th day of January 1920. in testimony whereof l'have signedthis specification.

' 7 V JEAN PERONY. 

